.header {
    height: 50px;
    border-top: 3px solid #009a61;
    box-shadow: 0px 2px 10px 0px rgba(0,0,0,0.1), 0 1px rgba(0,0,0,0.1);
    background: #fafafa;
}

.header .nav {
    position: relative;
    width: 900px;
    margin: 0 auto;
}

.header a {
    color: grey;
    text-decoration: none;
    line-height: 50px;
}

.header span {
    line-height: 50px;
}

.header .left-link {
    position: absolute;
    left: 0px;
}

.header .right-link {
    position: absolute;
    right: 20px;
}

.header .user {
    position: absolute;
    right: 20px;
}

.header button:hover {
    cursor: pointer;
}